So last night i set my alarm to 4 AM, woke up and tried FILD, didnt work.
So while i was going back to sleep i tried WILD just for the heck of it, then i started seeing swirling images and colors for about 10-15 mins.Then it felt like my bed and room started shaking pretty hard, i got freaked, and snapped out of it, now im mad at myself for waking up!! 
Don’t worry, it’s a very different experience, and I believe everyone freaks out on the first time. 
Just keep trying. You’ll get used to it and will eventually do a WILD. 
Hey that’s EXACTLY what happened to me (tried FILD/MILD, then tried WILD and totally freaked). It’s okay though bro, we can try again 
Also happened to me, but another thing. when it happened, it felt like my eyes were cross-eyed, and when i thought about that it hurt for a second then i woke up with same shaking thing. Not my first try at LDing though, rather it was my 1st attempt at a WILD. Happened a while back though.